# Letter Intervention — Letter Incremental Rehearsal

> Educational app for teaching letters and sounds using Incremental Rehearsal. (iPhone/iPad app by I Teach Tiny Humans, LLC.)

- Source: https://appshunter.io/ios/app/letter-intervention/id1288517718 (this page in markdown: same URL + `.md`)
- Developer: [I Teach Tiny Humans, LLC](https://appshunter.io/developer/1175634279)
- Category: Education, Games, Family, Word
- Price: $0.99
- Rating: 4.50/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 13.0 · 15 MB
- Languages: American English
- Released: 2017-10-10
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/letter-intervention/id1288517718/reviews.md

## What is Letter Intervention?

Letter Intervention is a systematic method of teaching your student or child letters and letter sounds by using proven Incremental Rehearsal techniques. This application is designed by Kindergarten and First Grade Educators at top elementary schools who have effectively used these techniques to teach many students as part of core curriculum. Now your student or child can leverage our experience to master letters and sounds and build confidence and a strong base for reading.

This application allows you to complete comprehensive assessments of your students' abilities across six different categories including letter identification and sounds across upper case, lower case and mixed case. After completing assessments, you can focus interventions by selecting nine known letters or sounds and one unknown for the student. Through incremental rehearsal, known letters or sounds are reinforced while those not yet known are mastered. These techniques have been proven to work in many classroom and home settings. 

This application guides you through  interventions by presenting letters or sounds in the following order, where Z is unknown and A through I are known by the student:

Z
A, Z
A, B, Z
A, B, C, Z
A, B, C, D, Z
A, B, C, D, E, Z
A, B, C, D, E, F, Z
A, B, C, D, E, F, G, Z
A, B, C, D, E, F, G, H, Z
A, B, C, D, E, F, G, H, I, Z

For each interaction in assessments or interventions, the facilitator records whether the student knows the letter/sound or not. The application tracks each and every assessment, automatically recording proficiency when the student reaches 80% for the letter or sound or marking as unknown if proficiency drops below the 80% threshold. 

Detailed reports show the following:
- Percentage known by category and each letter or sound within the list
- Number of letters or sounds learned by week
- Charting of letters or sounds learned by week compared to goal
- Email progress, detailed results and charts

We hope this offering increases your students' abilities in mastering letters and sounds and learning to read. We gladly accept feedback and strive to provide the best products for you and those wanting to teach and learn.

## Key features

- Incremental Rehearsal techniques
- Comprehensive letter and sound assessments
- Customizable interventions
- Progress tracking and detailed reports
- Email progress reports
- Designed by educators


## Frequently asked questions about Letter Intervention

### What is Letter Intervention?

Letter Intervention is an educational app that uses Incremental Rehearsal techniques to teach children letters and their corresponding sounds. It was developed by kindergarten and first-grade educators to provide a structured approach to early literacy.

### How does Letter Intervention teach letters and sounds?

The app employs Incremental Rehearsal, a method where known letters are reinforced while unknown ones are gradually introduced and mastered. This process is guided by the app through assessments and targeted interventions.

### What kind of assessments does Letter Intervention offer?

Letter Intervention provides comprehensive assessments across six categories, including letter identification and sounds for uppercase, lowercase, and mixed-case letters. This helps identify specific areas needing focus.

### Can I track my student's progress with Letter Intervention?

Yes, the app offers detailed reports showing proficiency percentages by category and individual letters/sounds, the number of letters/sounds learned weekly, and charts comparing progress to goals. You can also email these detailed results.

### What devices is Letter Intervention compatible with?

Letter Intervention is available for iPhone, iPad, and iPod. It is designed for iOS devices.

### What is the age rating for Letter Intervention?

Letter Intervention has an age rating of 4+, making it suitable for preschool and early elementary-aged children.

### How often is Letter Intervention updated?

The latest version of Letter Intervention is 2.1.313, and it was last updated on April 24, 2020. This indicates a history of development and potential for future updates.

### Does Letter Intervention have ads?

No, Letter Intervention does not contain advertisements. As a paid application, it offers an ad-free learning experience.

## Version history (last 5 releases)

### 2.1.313 — 2020-04-24

> Fixed issue where intervention was not showing the known word at the end of the last iteration
> Added challenge question for emailing student results
> Support for iOS 13 and above

### 2.0.1206 — 2018-12-10

New features including:
* Quick assessment functionality. Assess students over the entire list rather than by flashcard.
* When reassessing a letter or sound, reset stats for that letter or sound for student.
* Added summary stats on the result list screen.
* Added detailed stats on the result list items screen.

### 1.2.1007 — 2018-10-11

* Improved navigation between screens
* When click letter sound flash card, play letter sound rather than letter name
* Auto uppercase when adding student names
* Allow removal of Guest student

### 1.2.607 — 2018-06-08

> Updated placement of user interface controls on main page to better support iPad and iPhone

### 1.2.606 — 2018-06-07

> Added ability to email progress chart
> User interface optimizations for iPhone X

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## More apps by I Teach Tiny Humans, LLC

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- [Magic 10](https://appshunter.io/ios/app/magic-10/id628570386)

All apps by I Teach Tiny Humans, LLC: https://appshunter.io/developer/1175634279

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*